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" If the crank is given ^ of a turn 59 times, it makes 39i turns, or | of a turn less than the 40 turns required for one revolution of the work. Hence the index plate must move in the same direction as the crank | of a revolution while the work revolves... "
Machine-shop Mathematics - Page 71
by George Wentworth, David Eugene Smith, Herbert Druery Harper - 1922 - 162 pages
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Machine Shop Practice, Volume 2

Karl Hans Moltrecht - Technology & Engineering - 1981 - 532 pages
...arbitrarily selected number of divisions (A) Formula 7-3A is used when A is larger than N. In this case the index plate must move in the same direction as the crank. To do this one idler gear must be used in the gear train. Formula 7-3B is used when N is larger than...
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